Micrometer-caliper



' F. 0. JAQUES, sR.

MICROMETER CALIPER.

APPLICATION FILED SEPT. 6. 1919.

1 361 156 Paten ted Dec. 7, 1920.

' Yaw ATTDENEY:

UNITED STATES PgrENT OFFICE.

FERNANDO OSCAR JAQUES, 33., OF PROVIDENCE, RHGIDE ISLAND, ASSIGNOR TOFERNANDO OSCAR JAQUES, JR., OF PROVIDENCE, RHODE ISLAND.

MIGROMETER-CALIPER.

Specification of Letters Patent.

Patented Dec. 7, 1920.

Application filed September a, 1919. Serial No. 322,126.

To all whom it may concern.

Be it known that I, Fnnnanno OSCAR JAQUES, a citizen of the UnitedStates, residing at Providence, in the county of Providence and State ofRhode Island, have invented a new and useful Improvement inidicrometer-Calipers, of which the following is a specification.

My invention has reference to an improvement in instruments of precisionand more particularly to an improvement in that form of micrometercalipers known as easy reading micrometers.

In easy reading micrometer calipers it is essential that the numeralswhich give the reading, be as large as possible and that the number ofmovable parts he reduced to a minimum, so as to reduce friction inturning the spindle. Such micrometers as heretofore constructed, usuallyhave too many movable parts operated from the spindle and which createso much friction, that the spindle cannot be turned with the delicatesense of touch required.

The object of my invention is to improve the construction of an easyreading micrometer caliper, whereby the figures are of a sir .e that canbe easily seen, the construction simplified, the number of parts greatlyreduced and the friction of said parts reduced to a minimum.

l d y invention consists in the peculiar and novel construction of amicrometer caliper having a measuring indicating mechanism operated fromthe spindle, said measuring indicating mechanism giving the measurementby numerals on a hand through a sight opening in the handle and havingdetails of construction, as will be more fully set forth hereinafter andclaimed.

Figure 1 is a side view of my easy readingmicrometer caliper. 7 v Y rFig. 2 is an enlarged detail view of the sight opening in the micrometercaliper.

F 3 is an enlarged detail sectional view showing the easy readingmechanism in the handle of the caliper. I,

Fig. 4; is an enlarged face view of the gearing showing its connectionwith the spindle of the caliper, and I Fig. 5 is an enlarged edge viewof the thin metal band on which are the numerals and showing itsoperative connection with the spindle of the caliper.

In the drawing 6 indicates the approxiat one end into a pin gear 26.

mately U shaped handle, 7 the barrel, '8 the thimble,9 the spindle and10 my improved measuring indicating mechanism of a micrometer caliper.

The handle 6 has a cavity 11 for the indicat ngmechanism 1O closed by aplate 12 which is held in place by recessing the barrel end of the plateinto the barrel and a screw 13 which screws into the handle as shown nFig. 3. The spindle portion of the cav- 1ty 11 is closed by a fitting 14secured tof the handle 6 by a screw and having a hole through which thespindle 9 extends. The barrel 7 and the thimble 8 have the usualconstruction. The spindle 9 has the usual forty pitch screw-threads, notshown, screwthreaded through the inner end portion of the barrel, notshown, and has in addition, a longitudinal groove 15. A gear 16 on thespindle 9 has a tongue 19 in the groove 15. The gear 16 meshes with agear 17 which in turn meshes with a gear 18, all of the "cars 16, 17 and18 having the same pitch.

he gear 17 is secured to a shaft 20 which revolves in bearings 21.21 inthe handle 6 and plate 12 and the gear 18 is secured to a shaft 22 whichrevolves in bearings 23.23 in the handle 6 and plate 12. A roll 24 has asliding fit on the spindle 9 and a tongue 25 in the groove 15 andisformed The roll and pin gear rotates with the spindle but is held fromlongitudinal movement by the handle 6 and fitting l-i. A thin metal band27 has a series of pin holes 28 28 extending longitudinally and whichcoincide with and through which the pins on the pin gear 26 extend andengage with the band, to move the band, thereby positively connectingthe band with the pin gear. One end 29 of the. band is secured to theshaft 20 and the other end '30 of the band is secured to the'shaft 22 in'any'well known way, the ends of the band coiling loosely around theshafts, as shown in Fig. 5. The band 27 has numerals on its face, asshown in Fig. 3, indicating units of measurement, said numerals in a oneinch micrometer caliper reading from 0 to 999, and these numerals extendnearly the length of the band.

In the operation of my improved micrometer caliper the spindle may beturned in either direction. In revolving the spindle 9 to the left, thegears 16, 17 and 18 will revolve in the direction of the arrows, as

shown in Fig. 4, thereby winding up the end 29 of the band 27 on theshaft 20 and unwinding the end 30 of the band 27 from the shaft 22. Asthe ends of the band are loosely wound on the shafts the differenceinthe diameters of the coils, when one end is wound up and the.other endunwound, is compensated for. With the reading at zero, one complete turnof the spindle 9, roll 24 and pin gear 26, to the left, will move theband 27 to bring up the figure 25 so that the same will be seen througha sight opening 31 in the fitting 14. The reading would then betwenty-five one-thousandths of an inch. After the spindle has beenrevolved thirteen complete turns to the left, the reading would be,three hundred and twenty-five one thousandths of an inch, as shown inFigs. 1 and 2. By the peculiar and novel construction of my improvedeasy reading micrometer caliper, the numerals on the band aresufficiently large so as tobe easily seen through the sight opening andby increasing the size of the roll 24F. may be made larger, if desired,the construction of the operating mechanism greatly simplified, andfriction in the indicating mechanism reduced to a minimum.

Having thus described my invention I claim as new 1. A micrometercaliper comprising a handle, a spindle through the handle, a roll on thespindle, a thin metal band over the roll, means for operati velyconnecting the roll with the-spindle, means for operatively connectingthe band with the roll, means on the band for indicating units ofmeasurement and means for operatively connecting the ends of the bandwith the spindle, for coiling up and uncoiling the ends of the band, inrotating the spindle.

. 2. A micrometer caliper comprising a handle, a spindle through thehandle, a roll on the spindle, a thin metal band over the roll, meansfor operatively connecting the roll with the spindle, means foroperatively connecting the band with the roll, means on the band. forindicating units of measurement, shafts rotatahly secured in bearings,one end of the band being secured to .one shaft and the other end of theband being secured to the other shaft, and means-operatively connectingthe shafts with the spindle, whereby on rotating the spindle the ends ofthe band will coil up on one shaft and uncoil from the other shaft.

3. A micrometer caliper comprisng a handle, a sight opening in thehandle, a spindle through the handle, a roll on the spindle, a thinmetal band over the roll, means for operatively connecting the roll withthe spin dle, means for operatively connecting the band with the roll,means on the band for indicating units of measurement through the sightopening, two shafts rotatably secured in bearings, one end of the bandbeing secured to one shaft, and the other end of the band being securedto the other shaft, and gears operatively connecting the shafts with thespindle, whereby on rotating the spindle the ends of the band will coilup on one shaft and uncoil from the other shaft.

4. A micrometer caliper comprising a handle having a sight opening and acavity, a plate over the cavity, a spindle through the handle, a rolland pin gear on the spindle, a thin metal band over the roll andoperatively connected with the pin gear, means for operativelyconnecting the roll and pin gear with the spindle, means on the band forindicating units of measurement through the sight opening, two shafts inthe cavity and rotatably secured in bearings in the handle and plate,one end of the band being secured to one shaft and the other end of theband being secured to the other shaft, and gears on the shafts andspindle operatively connecting the shafts with the spindle, whereby onrotating the spindle, the ends of the band will coil up on one sh aftand uncoil from the other shaft, and units of measurement will show insuccession through the sight opening.

5. A micrometer caliper comprising a handle having a sight opening and acavity, a plate over the cavity, a spindle through the handle and havinga longitudinal groove, a fitting over the cavity and spindle, a roll onthe spindle and having a tongue in the groove in the spindle, a pin gearon the spindle and having a tongue in the spindle groove, a thin metalband over the roll and pin gear and having pin holes through which thepins on the pin gear extend, means on the band for indicating units ofmeasurement through the sight opening, two shafts in the cavity androtatably secured in bearings in the handle and plate, one end of theband being loosely coiled around and secured to one shaft and the otherend of the band being loosely coiled around and secured to the othershaft, gears on the shafts meshing together, a gear on the spindlehaving a tongue in the spindle groove and meshing with one of the shaftgears, whereby on rotating the spindle, the ends of the band willloosely coil up on one shaft and loosely uncoil from the other shaft andunits of measurement will show in succession through the sight opening.

In testimony whereof, I have signed my name to this specification.

, FERNANDO OSCAR JAQUES, SR.

